public IActionResult Confirm(int id, IFormCollection collection)
        {
            var entity = new ApproveModel();

            TryUpdateModelAsync(entity);

            if (ModelState.IsValid)
            {
                var result = _service.Confirm(id, entity.IsPass, entity.Remark, CurrentUser.No, CurrentUser.Name);
                if (result > 0)
                {
                    return(RedirectToAction("Index"));
                }
                ModelState.AddModelError(string.Empty, "审核失败");
            }

            var model = _db.Load <Approval>(id);

            ViewBag.Entity = model;
            return(View(entity));
        }